Q2\ For normal distribution find : al z<1.2, blz<-0.68, cl -0.46 -1.28

Q: A normal distribution has u = 30 and o = 5.

A: Given that, Mean = 30 Standard deviation = 5 Z score = 1.3

Q: The mean and standard deviation for the exam results from a class of 135 students were calculated,…

A: Mean()=74standard deviation()=11

Q: Suppose data X1, ..., Хп, п> 30 are sampled from the population. According to central limit theorem,…

A: We want to tell you above statement is true or false

Q: Table entry Table entry for z is the area under the standard Normal curve to the left of z. > TABLE…

A:

Q: can you briefly help me explained what happened in this Theorem? I already know that the…

A: Given information: T is set of 20 means calculated from finding samples of size 20 from the larger…

Q: IQ scores can be modeled by a normal distribution x~N(100,15) A-find the prbability of an…

A: X follows a Normal distribution with mean = 100 and S.D = 15 Then z=(x-mean)/SD = (x-100)/15…

Q: Why not use z-test for approximate normal distribution that n>30?

A: We have given thatMean(µ) = 67300Sample size (n) = 36Sample mean (x̅) = 6500Standard deviations (s)…

Q: Find the z-score location of a vertical line that separates a normal distribution as described in…

A: As per company terms and conditions we can answer only 3 sub parts for a question please find below…

Q: For a standard normal distribution, determine P(z [three decimal accuracy]

A: The given z-value is -1.49.

Q: For the standard normal distribution shown on the right, find the probability of z occurring in the…

A:

Q: Find the mean and standard deviation of p (p with a hat over it)

A: Following information is given:  True population proportion of customers under age 21 (p) = 0.68.…

Q: Find the proportion of observation from a normal distribution N(0,1) that satisfies z>-0.52.

A: Given: the proportion of observation from a normal distribution N(0,1) that satisfies z&gt;-0.52

Q: About % of the area under the curve of the standard normal distribution is between 0.059 and z =…

A: Press 2nd and VARS Choose normalcdf

Q: For the standard normal curve, find the z-score that corresponds to the 7th decile

A: standard normal distribution Z~N(0,1) find z score correspond to 7th decile

Q: The average score for games played in the NFL is 22.3 and the standard deviation is 9.1 points. 8…

A:

Q: About ? % of the area under the curve of the standard normal distribution is between…

A:

Q: In the standard normal distribution, find the z value that corresponds to the 58th percentile.…

A: Here we need to find the 58th percentile of the standard normal distribution.

Q: What percentage of a normal distribution falls above a z score of -0.70? Type in your percentage and…

A: percentage of a normal distribution falls above a z-score of -0.70z-score=-0.70

Q: The height of waste bin manufactured by a factory for a garden have a normal distribution with mean…

A:

Q: Use a table of areas to find each of the shaded areas under the Standard Normal Distribution. (a)…

A: Solution-: Let, Z- be the standard normal random variable (a) P(0&lt;Z&lt;1.96)=? (b)…

Q: Scores on a certain IQ test are approximately normally distributed with a mean of 100 and a standard…

A: As per our guidelines we are suppose to answer only three subparts kindlypost the remaining subparts…

Q: Below is a graph of a normal distribution with mean μ = 1 and standard deviation 6 =3. The shaded…

A: According to the given information in this question, we need to find the following probability

Q: Z= 123 - 105 / 15  Second Part is a fraction. This is statistics to find the normal curve, please…

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Q: A simple random sample of 100 postal employees is used to test if the average time postal employees…

A: Given,            Mean X =7            Standard deviation S=2            Sample size n=100…

Q: These curves represent normal distributions with different means and standard deviations. What do…

A: On the basis of the above Normal Curves given :

Q: Do continuous distributions have a mode? Can you find the mode of the normal distribution?

A: Introduction  From the above question we have to show does the continuous distributions have a mode…

Q: For the standard normal curve, find the z-score that corresponds to the third quartile then find the…

A: To find the Z-score for the first quartile and third quartile for a standard normal curve.

Q: tion x = 58 f

A: A statistical tool known as a z score can be used to estimate how far a raw score is from a mean of…

Q: normal normal distribution has a mean of u=100 and o=20.

A: Normal distribution, also known as the Gaussian distribution, is a probability distribution that is…

Q: Z N(0,1) or standard normal distribution .: i P (Z <0.68).

A:

Q: The average score for games played in the NFL is 21.2 and the standard deviation is 9.3 points. 44…

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: Using the standard normal distribution, find the two z-scores that that form the middle shaded…

A: To calculate P(Z&lt;-z) is calculated as : (1) Using normal table . (2) Using Excel software and…

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 16. Assume that…

A: Given Information: IQ scores are normally distributed with a mean of 100 and a standard deviation of…

Q: Below is a graph of a normal distribution with mean μ = -5 and standard deviation o=3. The shaded…

A: given data  μ = -5σ = 3P(x&gt;-2) = ?

Q: Below is a graph of a normal distribution with mean μ=-2 and standard deviation o=3. The shaded…

A: The provided information is  µ=-2 σ=3 P(X&gt;1) P(X-µσ&gt;1-(-2)3)P(z&gt;1)=0.1586  (from…

Q: The average number of miles (in thousands) that a car's tire will function before needing…

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Q: Explain why t distributions tend to be flatter and more spread out than the normal distribution

A: The t distribution is similar to the normal distribution; it has all the characteristics that normal…

Q: For a recent English exam, use the Normal model N(73, 9.2) to find the proportion of scores under…

A: From the provided information. Mean (x) = 73 And standard deviation (s) = 9.2 Let Y be a random…

Q: the right of the z value is

A: Use the standard normal table or Ti 83 to find the area to the right tail of the normal curve…

Q: The average score for games played in the NFL is 22.3 and the standard deviation is 9.3 points. 12…

A: Given information- Sample mean, µ = 22.3 Sample standard deviation, σ = 9.3 Sample size, n = 12 Let,…

Q: The thickness x of a protective coating applied to a conductor designed to work in corrosive…

A: Since, you  have post the multiple question. I am answering the first one. Please post the question…

Q: Q1. Following is a partial Chi-square table to check the goodness-of-fit for a normal distribution…

A: Chi-square test for goodness of fit suing normal distribution. Given the parameters of the normal…

Q: In a Normal Distribution with the Mean of 88 and the Standard Deviation of 7, find P (x > 77)

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: Below is a graph of a normal distribution with mean μ = -4 and standard deviation =2. The shaded…

A: The graph of normal distribution is given with the mean  and standard deviation